Lever-arm for door checks and closers.



No. 729,697. PATENTED JUNE 2, i903.

w. H. TAYLOR.. r LEVER ARMVFOR DOOR CHECKS AND GLOS'ERS.

APPLIUA-I'ION FILED MAR. 13, 1903. 4

WITNESSES No. 729,697. Patented June 2, 1903.

UN TED? STATES PATENT FFICE.

WARREN I-I. TAYLOR, or STAMFORD, CONNECTICUT, AssicNoR 'ro THE YALE &TOWNE MANUFACTURING COMPANY, or sTAMronnCoN- NEOTICUT. .1 i

LEVER-ARM FoRoooRjcHEC s AND CLOSERS.

SPECIFICATION forming part of Letters Patent No. 729,697,.dated June2,1903. Application filedMai'oll 19,1903. Serial-No. 148,576. No model.)

'ings 9 therein, through which the liquid within chamber 1 may freelypass when the piston Sisnnoviug toward the shaft 4 and which closes whenthe piston is moving away from the shaft, as in the act of closing thedoor.

The piston normally or when the door to which the piston is attached isclosed rests beyond or in front of the by-pass valve 10, and until thisposition of the piston is reached the liquid in front of the piston hasa more or less restricted avenue of escape through the by-pass valve.-After the piston passes the by-pass the movement of the piston isretarded by the liquid confined in front of the piston and which canescape only by leakage around the piston.

The shaft 4' passes up through Chamber 2 and is provided with acrescent-shaped upper end to fit within a correspondingly shaped openingin the inner end of the lever-arm 14. Located within the spring-chamber2 and loosely surrounding shaft 4 is the ratchetsleeve 13. This sleeveis either directly or indirectly connected to the inner end of thespring 5 and connects the latter to the shaft,

so that when the shaft 4 is turned by the opening of the door the springwill be wound up or compressed, and when the door is released the springwill then unwind or expand and operate to close the door.

The lever-arm 14, as before stated, is secured on the upper end of shaft4, and the free end of the jointed section thereof is secured to thedoor-frame in the usual manner. The lever-arm is provided at its innerend with an elongated slot 15 for the reception of the rectangular plateor pawl 16, which lat- ;ter engages the teeth 17 of the ratchet-sleeve13 and locks the sleeve and its connected spring and the lever-armtogether. Thepawl 16 is of greater width than the thickness of thelever-arm through which it passes, and the slot in said arm is of suchsize 'asytopermit free vertical movement of the pawl without anylateralmovement. The pawl is provided on one side, and preferably near-its T(tZZ whom it may concern:

Beit known that I, WARREN Hy-TAvLoa, of Stamford, in the county ofFairfield and State of Connecticut, have invented certain new and usefulImprovements in Lever-Arms for Door Checks and Closers; andI do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to an improvement in lever-arms for door checks andclosers, and while it is designed particularly for use in con nectionwith liquid door checks and closers it may be used with any constructionwherein a pawl-and-ratchet connection is employed between the lever-armand spring.

The object of the invention is to provide a reversible lever-arm with avertically-sliding pawl constructed to fall by gravity and always dependbelow the arm in a position to engage the teeth of the ratchet-wheel;and it consists in the details of construction and cornbination ofparts, as will be more fullydescribed, and pointed out in the claims.

In the accompanying drawings, Figure l isa view in vertical section,showing a doorcheck with my improvement appliedthereto. Fig. 2 is a viewin longitudinal section of the, lever-arm and pawl. Fig. 3 is a planview of same. Fig. 4 is a view in transverse section, and Fig. 5 is aview in perspective of the pawl.

1 represents a horizontal cylindrical casing Closed at its ends andprovided on its top with a cylindrical chamber 2 and with lips 3, havingscrew-holes therein for the attachment of the device to a door. Theshaft or spindle 4 and the spring 5 are located within the chamber 2,the shaft extending out through the top of said chamber and also throughits bottom into horizontal chamber 1, the bearing for the shaft betweenthe two Chambers being packed to prevent the passage of oil or .45liquid up into the spring-chamber 2.

The crank 6 is secured to the lower end of shaft 4 and is connected bypitman 7 with the piston or other checking-surface 8, the latterpreferably having one or more valved open- Center, with a vertical rib18, which latter fits within a corresponding groove in the arm andabsolutely prevents any tilting movement of h the pawl. The rib 18projects on opposite sides of the arm and is bent laterally at its ends,so as to overlap the arm and prevent the withdrawal or displacement ofthe pawl. With this construction it will be seen that the pawl has atall times a bearing throughand thenpermitted to fall back into engage- Iment with theteeth.

It is evident that changes in the form and construction of the severalparts might be resorted to without departing from the spirit and scopeof my invention, and hence I would have it understood that I do notconfine myself to the details herein shown and described, but considermyself at liberty to make such changes as fairly fall within the spiritand scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-.- V

1. In a door-closer, a lever-arm having an elongated slot, a verticallysliding pawl mounted in the slot, and means for preventing verticaldisplacement of the pawl.

2. In a door-closer, a lever-arm having an elongated slot therein, and avertically-sliding pawl of greater width than the thickness of the armand provided on its edges with projections overlapping the arm forpreventing displacement of the pawl.

3. In a-door-closer, a lever-arm having an elongated slot and a grooveopening into said slot and a vertically-sliding pawl mounted in the slotand havinga rib resting in the groove.

4:. In a door-closer, a lever-arm having an elongated slot and a grooveopening into said slot, and a vertically-sliding pawl mounted in theslot and having a rib resting in the groove, and also provided withprojecting lips overlapping the wall of the slot for preventing thedisplacement of the pawl.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

WARREN I-I. TAYLOR.

Witnesses:

SCHUYLER MERRITT, F. T. ToWNE.

